blocks|key|1080607|text|对于其他有这个问题的人，我已经找到了答案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1080608|确保Eclipse将您的项目识别为Java项目。具体地说，在Project+Properties下，确保您有一个选中的Java+Builder。|1080609|这样，您的项目将被构建，并且您将在Problems视图中看到错误。|1080610|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

For anyone else who is having this problem, I have found the answer: 

Make sure that Eclipse recognizes your project as a Java project. Specifically, under Project Properties ensure that you have a Java Builder that is checked.

That way, your project will be built and you will see errors in the Problems view.

blocks|key|1080692|text|如果谷歌把你带到这个问题上，我想在这里发布我的故事。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1080693|不知何故，“项目->自动构建”被关闭了。|1080694|​|1080695|📷|atomic|offset|length|1080696|1080697|将其重新打开会生成更正错误列表。|1080698|我已经测试过Ganymede就是这种情况(在写这篇文章的时候，我正在运行Indigo+)|1080699|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/2b2f69261a437548407f2deae655dc3b.png|imageAlt^0|0|0|0|0|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@$I|12|J|13|1|14]]|A|$]]|$1|K|3|E|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|16|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|17|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|Q|$R|$5|S|T|U|A|$V|W|X|-4]]]]

I want to post my story here if Google brings you to this question.

Somehow, "Project->Build Automatically" got turned off.

<a href="https://i.stack.imgur.com/UYaZL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UYaZL.png" alt="enter image description here"></a>

Turning it back on produces correct errors list.

I've tested that this is the case as far as Ganymede ( at the point of writing this post I am running Indigo )

blocks|key|1080631|text|这就是我的问题：http://solveme.wordpress.com/2009/01/06/eclipse-project-missing-default-java-builder/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1080632|entityMap|0|LINK|mutability|MUTABLE|url|http://solveme.wordpress.com/2009/01/06/eclipse-project-missing-default-java-builder/^0|8|2D|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

This was my problem:
<a href="http://solveme.wordpress.com/2009/01/06/eclipse-project-missing-default-java-builder/" rel="noreferrer">http://solveme.wordpress.com/2009/01/06/eclipse-project-missing-default-java-builder/</a>

blocks|key|1080475|text|您可能需要更改Problems视图上的过滤器才能看到错误。在面板的右上角有一个向下箭头。单击它和Configure+Contents...，并在范围内确保选择了"On+->+element“。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1080476|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You'll likely need to change the filter on the Problems view to see the errors. There's a downward pointing arrow in the upper right corner of the panel. Click it -> Configure Contents..., and in the Scope make sure "On any element" is selected.

blocks|key|1295754|text|我有一个问题，那就是在由文件名组成的红叉图标中没有出现。我尝试了这个问题上描述的所有可能性。然而，在我的例子中，根本原因是我从SVN中删除了一个jar文件。因此，使用从该jar导入的java文件有错误。令人惊讶的是，这并没有出现。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1295755|查看构建路径，我在->构建路径下找到了->+jar+(缺少)。将其从构建路径中删除后，文件旁边的红色图标出现了!！令人痛苦的是，找到这个错误并浪费了这么多时间，我想知道为什么这个图标没有显示出来，也没有问题视图报告它。|1295756|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I had the problem where in the red cross icon by the file name did not appear. I tried all possibilities described on this question. However, the root cause in my case was, I deleted a jar file from SVN. So the java file using the imports from this jar had errors. Surprisingly that didn't show up.

Looking at the build path, I found under Java Build Path -> Libraries -> jar (missing).
Having removed it from the build path, the red icon next to the file showed up !!
Excruciating it was to find this error and wasting so much time, I wonder why this icon does not show up nor does Problem view report it.

blocks|key|1080775|text|我在谷歌上搜索这个问题也有同样的问题，我的解决方案是简单的->清洁项目。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1080776|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I googled this question having same problem, my solution was simply Project -> Clean.

blocks|key|1295816|text|我检查了Eclipse项目的.classpath文件。它的src值不正确，因此它指向错误的Java文件来源。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1295817|我的文件输入不正确：|1295818|<classpathentry+kind="src"+path="src"/>|code-block|syntax|javascript|1295819|我将其更改为正确的条目：|1295820|<classpathentry+kind="src"+path="source/java"/>|1295821|现在它起作用了。|1295822|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

I checked the .classpath file of the Eclipse project. It had incorrect value of src so it was pointing to the wrong source of Java files.

My files incorrect entry:

<pre><code>&lt;classpathentry kind="src" path="src"/&gt;
</code></pre>

I changed it to the correct entry:

<pre><code>&lt;classpathentry kind="src" path="source/java"/&gt;
</code></pre>

Now it is working.

blocks|key|1080548|text|我猜该项目的构建路径缺少核心库。例如，如果它是一个Java项目，则可能没有分配给它的JRE/JDK。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1080549|对于Java项目，请检查以下内容:+Properties+>+Java+Build+Path+>+Libraries+(根据Eclipse的版本不同，这可能会有所不同，我目前使用的是3.2.1+)|1080550|这里应该列出一个JRE或JDK。|1080551|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I'm guessing that the build path for that project is lacking a core library. E.g. if it's a Java project there may not be a JRE/JDK assigned to it.

For a Java project, check this: Properties > Java Build Path > Libraries (this may differ depending on the version of Eclipse, I'm using 3.2.1 at the moment)

There should be a JRE or JDK listed here.

blocks|key|1295918|text|我的问题是我有一个项目，我已经有一段时间没有编辑了，所以它链接到了我的系统上不再有的jre版本上。我转到项目属性-->+java构建路径并删除了对过时jre的引用。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1295919|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My problem was that I had a project that I had not edited in a while, so it was linking on a version of the jre that I no longer had on my system. I went to the project properties --> java build path and deleted the reference to the outdated jre.

blocks|key|1081055|text|我是STS的新手，我也遇到过类似的问题。直到我保存了文件，错误才会出现。我发现这是因为我使用的是文本编辑器，而不是Java编辑器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1081056|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I am a newbie to STS, and I had a similar problem. Errors weren't showing up until I saved the file. I discovered it was because I was using the Text Editor, instead of the Java Editor.

[Note: There is another thread about this problem but it did not answer the question.]

For one specific project in Eclipse, the problems view does not show errors. It shows warnings but it does not show errors. The other projects do show errors (and everything else). For that problematic project, I can see the red squiggly error line in the files. However, the directory structure does not show an error icon and the error is not populated in the Problems View.

Any ideas?

Eclipse Problems View doesn't show Errors

Eclipse

Java

注意:还有另一个关于这个问题的帖子，但它没有回答这个问题。对于Eclipse中的一个特定项目，problems视图不会显示错误。它会显示警告，但不会显示错误。其他项目确实会显示错误(以及其他所有内容)。对于那个有问题的项目，我可以在文件中看到红色的曲折错误行。但是，目录结构不会显示错误图标，问题视图中也不会填充错误。有什么想法吗？

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